<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      const user = {
        lastName: 'jack',
        firstName: 'zhang',
        set fullName(value) {
          const arr = value.split(' ');
          this.lastName = arr[0];
          this.firstName = arr[1];
        },
      };
      user.fullName = 'lili sun';
      // user.fullName('lili sun');
      console.log(user);
    </script>
  </body>
</html>
